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|
$NetBSD: patch-aj,v 1.3 2001/01/10 06:03:15 briggs Exp $
*** /dev/null Wed Dec 31 19:00:00 1969
--- mit-pthreads/machdep/syscall-powerpc-netbsd.S Tue Jan 9 22:35:59 2001
***************
*** 0 ****
--- 1,185 ----
+ #include <machine/asm.h>
+ #define COMPAT_43
+ #include <sys/syscall.h>
+ #ifndef __CONCAT
+ #include <sys/cdefs.h>
+ #endif
+ #define CONCAT __CONCAT
+
+ #undef SYSCALL
+
+ /* Kernel syscall interface:
+ Input:
+ 0 - system call number
+ 3-8 - arguments, as in C
+ Output:
+ so - (summary overflow) clear iff successful
+
+ This macro is similar to SYSCALL in asm.h, but not completely.
+ There's room for optimization, if we assume this will continue to
+ be assembled as one file.
+
+ This macro expansions does not include the return instruction.
+ If there's no other work to be done, use something like:
+ SYSCALL(foo) ; ret
+ If there is other work to do (in fork, maybe?), do it after the
+ SYSCALL invocation. */
+
+ ENTRY(machdep_cerror)
+ mflr 0 # Save LR in 0
+ stwu 1,-16(1) # allocate new stack frame
+ stw 0,20(1) # Stash 0 in stack
+ stw 31,8(1) # Stash 31 in stack (since it's callee-saved
+ mr 31,3 # and we stash return there)
+ bl PIC_PLT(_C_LABEL(__errno))
+ stw 31,0(3) # *errno() = err
+ lwz 0,20(1) # Restore LR from stack to 0
+ neg 3,31 # return -errno to 3
+ lwz 31,8(1) # Restore 31 from stack
+ mtlr 0
+ la 1,16(1) # Restore stack frame
+ li 4,-1 # Put -1 in r4 for those syscalls that return
+ blr # two values
+
+ /* The fork system call is special... */
+ ENTRY(machdep_sys_fork)
+ li 0, SYS_fork
+ sc
+ bso PIC_PLT(_C_LABEL(machdep_cerror))
+ addi 4,4,-1
+ blr
+
+ /* The pipe system call is special... */
+ ENTRY(machdep_sys_pipe)
+ mr 5,3
+ li 0,SYS_pipe
+ sc
+ bso PIC_PLT(_C_LABEL(machdep_cerror))
+ stw 3,0(5) # Success, store fds
+ stw 4,4(5)
+ li 3,0
+ blr # And return 0
+
+ #ifndef SYS___sigsuspend14
+ /* The sigsuspend system call is special... */
+ ENTRY(machdep_sys_sigsuspend)
+ lwz 3,0(3)
+ li 0,SYS_compat_13_sigsuspend13
+ sc
+ b PIC_PLT(_C_LABEL(machdep_cerror))
+ #endif /* SYS_sigsuspend14 */
+
+ #ifndef SYS___sigprocmask14
+ /* The sigprocmask system call is special... */
+ ENTRY(machdep_sys_sigprocmask)
+ or. 4,4,4 # Set == NULL ?
+ li 6,1 # how = SIG_BLOCK
+ beq Ldoit
+ lwz 4,0(4) # if not, replace it in r4 with #set
+ mr 6,3
+ Ldoit: mr 3,6 # ... using sigprocmask(SIG_BLOCK)
+ li 0,SYS_compat_13_sigprocmask13
+ sc
+ bso PIC_PLT(_C_LABEL(machdep_cerror))
+ or. 5,5,5 # Check to see if oset requested
+ beq Ldone # if oset != NULL
+ stw 3,0(5) # *oset = oldmask
+ Ldone:
+ li 3,0 # return 0
+ blr
+ #endif /* SYS_sigprocmask14 */
+
+ /* More stuff ... */
+
+ /* For fstat() we actually syscall fstat13. */
+ ENTRY(machdep_sys_fstat)
+ li 0, SYS___fstat13
+ sc
+ bnslr
+ b PIC_PLT(_C_LABEL(machdep_cerror))
+
+ /* Do we need to save the entire floating point state? I think so... */
+ ENTRY(__machdep_save_fp_state)
+ stwu 1,-8(1)
+ stw 3,4(1)
+ stfd 0,0(3)
+ stfdu 1,8(3)
+ stfdu 2,8(3)
+ stfdu 3,8(3)
+ stfdu 4,8(3)
+ stfdu 5,8(3)
+ stfdu 6,8(3)
+ stfdu 7,8(3)
+ stfdu 8,8(3)
+ stfdu 9,8(3)
+ stfdu 10,8(3)
+ stfdu 11,8(3)
+ stfdu 12,8(3)
+ stfdu 13,8(3)
+ stfdu 14,8(3)
+ stfdu 15,8(3)
+ stfdu 16,8(3)
+ stfdu 17,8(3)
+ stfdu 18,8(3)
+ stfdu 19,8(3)
+ stfdu 20,8(3)
+ stfdu 21,8(3)
+ stfdu 22,8(3)
+ stfdu 23,8(3)
+ stfdu 24,8(3)
+ stfdu 25,8(3)
+ stfdu 26,8(3)
+ stfdu 27,8(3)
+ stfdu 28,8(3)
+ stfdu 29,8(3)
+ stfdu 30,8(3)
+ stfdu 31,8(3)
+ mffs 0
+ stfdu 0,8(3)
+ lwz 3,4(1)
+ lwz 1,0(1)
+ blr
+
+ ENTRY(__machdep_restore_fp_state)
+ stwu 1,-12(1)
+ stw 3,4(1)
+ stw 4,8(1)
+ mr 4,3
+ lfdu 1,8(3)
+ lfdu 2,8(3)
+ lfdu 3,8(3)
+ lfdu 4,8(3)
+ lfdu 5,8(3)
+ lfdu 6,8(3)
+ lfdu 7,8(3)
+ lfdu 8,8(3)
+ lfdu 9,8(3)
+ lfdu 10,8(3)
+ lfdu 11,8(3)
+ lfdu 12,8(3)
+ lfdu 13,8(3)
+ lfdu 14,8(3)
+ lfdu 15,8(3)
+ lfdu 16,8(3)
+ lfdu 17,8(3)
+ lfdu 18,8(3)
+ lfdu 19,8(3)
+ lfdu 20,8(3)
+ lfdu 21,8(3)
+ lfdu 22,8(3)
+ lfdu 23,8(3)
+ lfdu 24,8(3)
+ lfdu 25,8(3)
+ lfdu 26,8(3)
+ lfdu 27,8(3)
+ lfdu 28,8(3)
+ lfdu 29,8(3)
+ lfdu 30,8(3)
+ lfdu 31,8(3)
+ lfdu 0,8(3)
+ mtfsf 127,0
+ lfd 0,0(4)
+ lwz 3,4(1)
+ lwz 4,8(1)
+ lwz 1,0(1)
+ blr
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